LayoutTests/editing/selection/addRange.html

<p>This tests Selection::addRange().  It should have no effect if the range passed to it does not intersect the currently selected range.  '3456' should be selected.</p>
<div id="div">123456789</div>

<script>
var sel = window.getSelection();
var div = document.getElementById("div");
var text = div.firstChild;

var range = document.createRange();
range.setStart(text, 3);
range.setEnd(text, 5);
sel.addRange(range);

range.setStart(text, 4);
range.setEnd(text, 6);
sel.addRange(range);

range.setStart(text, 2);
range.setEnd(text, 3);
sel.addRange(range);

// This should have no effect (until we support discontiguous selections) since this range doesn't intersect the currently selected range.
range.setStart(text, 7);
range.setEnd(text, 8);
sel.addRange(range);

// Ditto.
range.setStart(text, 0);
range.setEnd(text, 1);
sel.addRange(range);

</script>